#SMT Circuit Board

[circuitcardassembly]

Comprehensive Guide to SMT Circuit Board, Surface Mount PCB, and PCB Assembly Manufacturing

Surface Mount Technology (SMT) is at the heart of present day hardware, powering everything from smart phones to mechanical apparatus. In this direct, we investigate the basics of SMT Circuit Boards, Surface Mount PCBs, SMT PCB Boards, and the PCB assembly Manufacturing prepare. This comprehensive see at SMT highlights its focal points, the Manufacturing prepare, and its applications over different industries.

What is an SMT Circuit Board?

An SMT Circuit Board alludes to a printed circuit board (PCB) on which components are mounted specifically onto the surface, utilizing Surface Mount Technology. This strategy permits for a more compact and effective board plan, making it perfect for advanced gadgets. Not at all like conventional through-hole strategies, SMT does not require boring, permitting for quicker, more exact assembly.

Understanding Surface Mount PCB and SMT PCB Board

A Surface Mount PCB is a PCB particularly planned to bolster surface-mounted components. Utilizing SMT, producers put components on the PCB’s surface, permitting for a thick and proficient plan. This Technology is fundamental in miniaturized electronic gadgets, as it spares space without compromising performance.

The SMT PCB Board is commonly utilized over businesses, from customer gadgets to aviation Technology. Due to its compact plan, it is perfect for high-performance applications that require accuracy and durability.

Key Preferences of Surface Mount Technology in PCB Assembly

Surface Mount Technology offers various benefits that make it crucial in PCB Assembly manufacturing:

1. Compact Design

SMT permits for littler and lighter Boards, fundamental in today’s miniaturized gadgets, from smart phones to restorative equipment.

2. High-Speed Manufacturing

With computerized machines putting components, SMT streamlines the generation handle, empowering speedier Manufacturing speeds.

3. Improved Execution and Reliability

SMT components are less likely to involvement physical stretch, giving superior unwavering quality in high-vibration environments.

4. Reduced Cost

SMT assembly requires less materials and less labor, decreasing in general Manufacturing costs.

The Handle of PCB Assembly Manufacturing Utilizing SMT

PCB Assembly Manufacturing utilizing SMT includes a few exact and profoundly controlled steps:

1. Solder Paste ApplicationA stencil is utilized to apply patch glue to the zones where components will be put. This glue serves as the “Paste” for surface-mounted components.

2. Component Placement

Automated machines put each component precisely onto the patch paste-covered zones. This step is vital for adjusting components precisely.

3. Reflow Soldering

The PCB is at that point warmed in a reflow stove, softening the patch glue and making solid, steady bonds between components and the board.

4. Inspection and Quality Control

Once patched, the SMT PCB experiences thorough review. Strategies like Automated Optical Inspection (AOI) and X-ray assessment distinguish surrenders to guarantee ideal performance.5. Testing

Finally, utilitarian testing is conducted to affirm that the board works as planning. Imperfect Boards are repaired or disposed of to keep up tall quality.

Applications of SMT Circuit Boards and Surface Mount PCBs

Due to their compact estimate and tall unwavering quality, SMT Circuit Boards and Surface Mount PCBs are utilized in a wide extend of applications:

• Consumer Gadgets such as smart phones, portable workstations, and wearable's.

• Automotive Hardware for motor control units, infotainment, and security systems.

• Medical Gadgets counting symptomatic gear and convenient wellbeing monitors.

• Telecommunications for arrange foundation, switches, and flag preparing devices.

• Aerospace and Protection where solidness and execution beneath extraordinary conditions are critical.

Choosing a Solid PCB Assembly Manufacturer

Selecting the right PCB assembly manufacturer is significant for accomplishing quality and unwavering quality in electronic items. A dependable producer provides:

• Expertise in SMT Assembly

Look for producers experienced in SMT, guaranteeing they utilize the most recent Technology and high-quality materials.

• Advanced Testing and Quality Assurance

The producer ought to have strong quality control forms to guarantee each board meets strict standards.

• Custom Solutions

Choose a supplier competent of customizing PCB plans to fit your particular venture requirements.

Final Considerations on SMT Circuit Boards and PCB Assembly Manufacturing

SMT Circuit Boards and Surface Mount PCBs are essential in advanced electronic gadgets. Their compact, proficient plan permits for tall execution in a assortment of applications. Whether you're creating shopper hardware or mechanical hardware, choosing high-quality SMT PCB Assembly can altogether affect the unwavering quality and victory of your item.

[pcbandassembly]

The Importance of SMT Circuit Boards in PCB Assembly for Modern Electronics

Modern electronics are indeed becoming a crucial part of our lives-whether through smart phones or laptops or medical devices or automotive systems. This article presents the application of SMT circuit boards in PCB assembly and their value to modern electronic systems. To continue reading click on the link.

[hitech-pcba]

Medical PCB Assembly

sales12@hitechpcb.com

Medical PCB Assembly Manufacturer – One-stop service

Medical PCB Assembly Manufacturer –  One-stop service

Medical devices (medical PCB assembly) refer to instruments, devices, instruments; in vitro diagnostic reagents and calibrators, materials, and other similar or related items. There are used directly or indirectly in the human body, including the required computer software.

Hitech Circuits has extensive experience in providing medical PCB assembly services to our medical industry customers, and we deeply understand that our medical PCBA will be used in life-critical medical devices, which have extremely high requirements for precision and reliability.

We are committed to offering the world-class PCBA by strictly controlling the quality of every piece, our medical PCB assembly, box build assembly, and prototypes assembly capacities allow us to assemble kinds of medical devices such as diagnostic imaging equipment, lasers, and handheld dental tools.

At Hitech Circuits, we take care of the medical PCB assembly of your product so you can spend more time running your business and marketing your medical devices.

Hitechpcba medical PCB assembly technique:

Whether in a controlled environment such as a hospital or in an uncontrolled environment such as a home health care center, medical equipment must protect the lives of patients and surgeons. Medical PCBA refers to instrumented circuit boards that are used directly or indirectly in the human body. Such as instruments, equipment, instruments, in vitro diagnostic reagents, and calibrators, materials, and other similar or related instruments.

Therefore, the requirements for component procurement and processing are very strict, and a more precise technique is required, which is produced by IPC Class 3 standard. Hitechpcba is fully certificated, apart from certifications of ISO9001:2015, ISO14001, REACH and IATF16949, we have also obtained the ISO13485 certification, which means that our PCBs can meet the high standards required by medical devices, and all of our finished medical devices are of FDA Class II. Working with us can avoid you from worrying about the quality problem.

This standard provides you with the ability to produce and manufacture to meet higher customer needs. In the medical device industry, safety and quality are not negotiable. At every step of the product life cycle, including service and delivery, regulatory requirements are becoming more stringent.

More and more industry organizations want to showcase their quality management processes and make sure that everything they do is best practice. PCBA is used in the medical industry to bring good news to patients. Hitechpcba is a certified manufacturer offering a one-stop PCB and PCBA turnkey service with 15 years experience and we have the confidence to become your preferred supplier.

Hitechpcba advantages:

We offer unprecedented service and flexibility for any medical device PCB. Without a small batch test, you can’t start your concept prototype so that it doesn’t help you get it to market. We offer comprehensive engineering support to make your medical device printed circuit board manufacturing process reality in the most cost-effective way.

We provide high-end customized processing services for PCBA in medical machinery customers. It is manufactured by PCB circuit board, component procurement, SMT chip processing, patch plug-in soldering, assembly testing and other one-stop services.

QC was set up in front of the furnace for poor screening, PCBA 100% visual inspection after furnace, PCBA 100% optical inspection, and 13 temperature zone reflow soldering each product independently set temperature. Must undergo rigorous tests, such as ICT, FCT, Burn-in test. The products produced include monitors, pacemakers, sphygmomanometers, etc.

We ensure the quality, reliability, and traceability of our medical PCB manufacturing assembly.

Over 15 Years of Medical PCBA Experience

With more than 10 years of experience in offering PCB assembly services, we have a good understanding of the medical industry, our experts have participated in a host of projects to provide medical PCBA solutions to leading medical companies and get trusted by them.

Types of Medical PCB Assemblies

As a PCB expert, Hitechpcba is capable of assembling types of medical PCBs such as multi-layer PCBs, rigid, rigid-flex PCB, and flexible PCBs, and there are various PCB materials available including copper, aluminum, and standard FR4, etc. So our medical PCB assembly solutions can be used for almost all medical devices.

High Efficiency

We utilize state-of-the-art equipment for medical PCB assembly that can reduce errors during the assembly process, meanwhile, we have proficient workers who know how to assemble PCBs correctly and efficiently.

The trend of PCB Medical Industry

The medical field is not like it used to be. Advances in technology have revolutionized the industry. This change is even more evident in electronic diagnostic, research, and treatment systems and tools. Every day, several complex electronic devices and instruments are introduced to simplify various medical procedures. This growth has largely benefited the PCBA technology industry because, without PCB in medical, new inventions would not be impossible. To meet the ever-changing needs of medical device and diagnostic machine manufacturers, today's PCB manufacturers are manufacturing extremely simple parts into highly complex PCB in medical industry. Using specialized high-speed laminates, copper and aluminum substrates, ceramics, and coatings, PCB manufacturers can make these boards best suited for medical industry applications.

Custom Medical PCB Assembly

Custom circuit board design in medical is the trend today. The medical industry has chosen the same approach when it comes to PCB. Customers can provide the correct specifications with the full form of PCB in medical for board size in X-direction, board size in Y-direction, total number of holes, minimum alignment and pitch size in inches, board material, number of layers, surface coating, etc. Therefore, the manufacturer will work according to the given specifications and deliver the right product for your application.

[fpcway-daisy]

Flex PCB Details Display......

[hitechpcb]

PCB Assembly & Electronic Assembly service & electronics manufacturing company – Hitech Circuits Co., Limited As leading one-stop PCB Assembly services provider in China, Hitech Group offers high quality, cost effective and express PCB board products and provides PCB manufacturing, electronics assembly manufacturing, components sourcing, Box build assembly and PCBA testing services for our customers. sales@hitechpcb.com www.hitechcircuits.com

[hitechpcba]

PCBA factory from China -- Hitechpcba

This is a 6-layer through hole PCB with impedance controlled, the raw material is IS400, as you see the surface finish is ENIG, the copper thickness is 1OZ for all layers, the finished thickness is 1.63mm. Besides, you can see, this is a PCBA board mounted on both top side and bottom side, also a BGA component were assembled on the board. We Hitech Circuits not only provide PCB manufacturing service, also provide service of components sourcing and assembly for our customers. If you have interest, please feel freely to contact us. 

Hitechpcba offer turnkey electronics assembly services, including prototype pcb assembly or low & high volume pcb assembly production. Our PCB assembly service always exceed customer’s expectations for quality, price and delivery.  We manage the whole process including ordering PCB manufacturing, sourcing components, PCB assembly, and PCBA testing, etc. www.hitechpcba.com

[jalina268]

if you just engage in or somehow need this printed circuit assembly or custom another new one,welcome contact me to know more details

[pncinc]

Our PCB assembly Illinois firm has been providing IPC-610-compliant, high-quality, on-time, affordably-priced circuit board assemblies for the better part of the last fifty years. We are also AS9100D certified and SBA and ITAR registered. New certifications and approvals for the business include MIL-PRF-55110, MIL-PRF-31032, ITAR, and ISO-9001D. Not only does PNC employ people who have certifications like IPC-A-600 and IPC-A-610, but the company also has an in-house trainer who helps other employees get certified as well (J-STD-001, for example).

[wirelesstraining]

Reliable, Affordable & Trustworthy Electronics PCB Repair Services & Courses Across Canada/USA

Wireless Training Center is a well-known name in the electronics industry, providing top-notch Electronics PCB repair services in Canada and the USA. With years of experience and expertise, we have established ourselves as one of the best providers of PCB Repair Technician Courses in Canada/ USA.

Wireless Training Center has highly skilled and experienced technicians. Our technicians have been trained to the highest industry standards and are equipped with the latest tools and technology to provide the best possible service and Courses. We can troubleshoot and repair a wide range of PCB issues, including faulty components, damaged circuits, and broken connections.

We use only high-quality components and materials in repairs, ensuring that the repaired PCB will be reliable and long-lasting. Wireless Training Center's PCB repair services are not limited to any specific industry or application. We have experience working with a wide range of PCBs, including those used in the telecommunications, medical, automotive, and industrial sectors. Whether it's a simple repair or a complex overhaul, we have the expertise and experience to get the job done right. This makes us a one-stop-shop for all your electronics needs, whether you're looking for Certified Circuit Board Repair Professionals Training Course or MacBook and iMAC Mother Board Repair Courses in Montreal, Toronto and Vancouver.

Wireless Training Center is also known for its exceptional customer service. We understand that when a customer's PCB is not working, it can have a significant impact on their business operations. That's why we offer quick service to our customers. We also deliver a range of service and course options, including PCB, SMT Rework, reflow and repair training in Canada / USA, to ensure that customers can get their PCBs fixed as quickly and conveniently as possible.

For further info give us a call at (778) 835–2763 or visit us at: https://wirelesstrainingcenter.com/  

[circuitcardassembly]

Understanding SMT Circuit Board and Surface Mount PCB Technology

Surface Mount Technology has become a standard process in the production of most devices. It has, to a large extent, transformed the way printed circuit boards (PCBs) are assembled to have all their components mounted directly on the board surface, hence making it much compact and much more robust. In this article, we will talk about SMT circuit boards, SMT PCB boards, and the in general affect of surface mount PCB Technology on the hardware industry.

What is an SMT Circuit Board?

An SMT Circuit Board is a sort of printed circuit board where electronic components are mounted straightforwardly onto the surface, or maybe than being embedded into gaps as in conventional Through-Hole Technology (THT). This handle is perfect for creating littler and more productive electronic gadgets. SMT permits for higher component thickness and speedier assembly.

Benefits of SMT Circuit Boards

1. Compact Plan: SMT circuit boards permit for littler and lighter plans, making them reasonable for present day gadgets such as smart phones and tablets.

2. High-Speed Generation: The computerized nature of SMT empowers quicker generation times, decreasing labor costs and expanding fabricating efficiency.

3. Improved Execution: The shorter electrical ways between components improve the execution of the circuit, coming about in superior flag transmission and lower resistance.

4. Cost-Effective: SMT decreases the require for boring gaps in the PCB, bringing down the taken a toll of generation, particularly for large-scale manufacturing.

What is an SMT PCB Board?

SMT PCB Board are printed circuit boards that utilize Surface Mount Technology to join components specifically to the board’s surface. These boards are the spine of numerous advanced electronic gadgets, giving a stage for mounting resistors, capacitors, transistors, and other components without the required for through-holes.

Surface Mount PCB vs. Through-Hole PCB

• Size and Space Productivity: Surface Mount PCB are much littler and more space-efficient compared to through-hole PCBs. This makes SMT perfect for compact electronic products.

• Assembly Speed: SMT permits for computerized gathering, essentially speeding up the generation handle, whereas through-hole Technology requires manual mediation in numerous cases.

• Component Thickness: SMT empowers higher component thickness, permitting more components to be set on a littler board. Through-hole PCBs have restrictions in this respect due to the estimate of the gaps and the space required.

• Durability and Execution: Whereas through-hole Technology gives more grounded physical associations, SMT PCBs offer superior electrical execution and are more reasonable for high-frequency applications.

Applications of SMT PCB Boards

• Consumer Gadgets: SMT is broadly utilized in the generation of gadgets such as smart phones, tablets, computers, and wearables due to its compact plan and quick generation capabilities.

• Automotive: The car industry depends on SMT PCBs for electronic control units (ECUs), sensors, and infotainment systems.

• Medical Gadgets: Numerous therapeutic gadgets, such as demonstrative hardware and observing frameworks, consolidate SMT PCBs for their tall unwavering quality and exact performance.

• Telecommunications: SMT is pivotal in broadcast communications framework, counting switches, switches, and communication gadgets, due to its capacity to handle complex circuits and tall frequencies.

Challenges of SMT PCB Assembly

1. Component Placement Precision: SMT components are much littler, requiring exact arrangement amid the get together prepare. Computerized machines are utilized to guarantee exactness, but any misalignment can lead to defects.

2. Thermal Administration: With the expanded thickness of components, overseeing warm scattering gets to be a challenge. Appropriate warm plan is basic to anticipate overheating and guarantee the life span of the circuit.

3. Inspection and Testing: Due to the complexity and estimate of SMT components, progressed assessment procedures such as Automated Optical Inspection (AOI) and X-ray review are required to identify potential issues.

Conclusion

SMT circuit boards and SMT PCB boards have ended up fundamental in cutting edge gadgets fabricating, advertising various points of interest in terms of estimate, execution, and generation effectiveness. With Surface Mount PCB Technology, producers can make compact, high-performing gadgets that meet the requests of today’s customer, car, and broadcast communications businesses.

[lirarubins]

Just How Carries Out A PCB Assembly Procedure Job?

The PCB assembly process begins with PCB fabrication, adhered to by part purchase. Parts are then put on the board utilizing automated pick-and-place devices. Solder insert is applied to connection parts during the course of reflow soldering. Inspection methods like AOI as well as practical testing ensure quality. Finally, panels are packaged for delivery after passing QC checks.

[adafruit]

Selective soldering 🔧🔬🔥

Selective soldering involves attaching specific components to printed circuit boards (PCBs) and molded modules, a method particularly useful for items susceptible to heat damage from standard reflow ovens or wave soldering found in conventional surface-mount technology (SMT) or through-hole assembly techniques. Typically, this method is applied after an initial SMT oven reflow phase. The components targeted for selective soldering are often nestled among others already soldered via a surface-mount reflow method. This demands high precision in the selective soldering process to prevent damage to the surrounding elements.

[fpcway-daisy]

Flex PCB Details Display......

[amy-hitechpcb]

LED PCB Assembly

What is the LED Circuit Board assembly?

Generally, LED PCB assembly is considered to be a circuit board that has the LED components soldered to it. The LED is soldered to the printed circuit board and features a chip that creates the light as electrically connected. A thermal heat sink and a ceramic base are used to bond the chip. Not all the PCB products can be used in Led industry, as an LED PCB is easy to create a high volume of heat, but making it hard to cool with traditional methods. For this reason, metal core PCB is widely used in LED application because of their enhanced ability to dissipate heat, especially aluminum pcb is often used to fabricate PCB for LED lights.

We’ve had great LED PCB assembly experiences with top LED chips to brand such as Cree, Luxeon, Osram, Nichia, Lumileds, MLS, EVERLIGHT, Samsung, LG, Seoul., etc. PCB LED lights can be incorporated into numerous lighting applications due to their combination of excellent energy efficiency, low cost and maximum design flexibility.

Application of LED PCB Assembly

Hitechpcba serves customers in different industries, providing highly reliable and innovative LED PCBs for various applications:

• Horticulture light LED PCB Assembly

• LED controller PCB Assembly

• Computer LED display and indicators

• LED lights PCB Assembly for medical use

• Automotive LED PCBs Assembly include PCBs for brake lights and headlights

• Street lighting LED PCB Assembly

• Flashlights and camping accessories

• Traffic light PCB Assembly

• Commercial lighting LED PCB Assembly

LED PCB Assembly specification

Number of layers for LED PCB

These layers are made up of aluminum and magnesium, but now have Copper base material  and Ceramic base materials for LED PCB industry, we can meet it.

Aluminum LED PCBs stand out among other PCBs because it has a good insulation characteristic and has a better machinery performance, the cheap cost is one important factor too.

Types of layers for LED PCB Assembly

Normally, the base layer is made using aluminum alloy metal.

This aluminum alloy substrate used in making the base makes it ideal for through-hole technology which transfers and dissipates heat.

A thermal insulation layer is made using some ceramic polymer which has good viscoelasticity characteristics.

It is highly heat resistant and protects the PCB against heat and mechanical stress.

The circuit layer, which is covered by a copper foil which can range from one to ten ounces.

LED Board type- single or in panel

Some boards are shapeless. For this reason, LED PCB panels are used. This reduces time, labor production and testing time.

Some LED PCB Assembly is done on a single board while others are done on panel boards.

LED PCB Assembly Process

Roughly, the PCBA process can be divided into theses phases: soldering paste printing > SMT (surface mounted technology) > reflow soldering > AOI (automated optical inspection)> THT (through-hole technology) > wave soldering > touch-up and cleaning > IC-programming > FCT (functional tests) > aging testing. 

Below we show you the process.

Step1. Summarizing Project Information

Before contacting your supplier, make sure you have all the project information. Suppliers will need info following for quoting LED PCB assembly:

Gerber

BOM

LED PCB specification

Quotation quantity

Once you have gathered these information, you can contact us and request for a quote.

Of course, you can also provide the schematic, LED PCB Assembly pictures and even samples to us. The more details they have, the more accurate the supplier’s quotation will be.

Step2. Discussion and details about custom LED PCB Assembly

Different projects will have different requirements. Remember the special requirements mentioned in step 1? That’s going to be the focus of this session. Equipment and engineering capacity will not be identical between suppliers. Make sure your supplier has the equipment to produce and assemble major components and the corresponding testing capabilities.

For example, some vendors don’t have X-ray testing equipment, which means they can’t check the mount quality of BGA chips. Outsourcing this step will increase risk and cost. That’s what you don’t want.

Also, pay attention to time taken by the supplier to quote. Motherboards often contain hundreds or even thousands of components, and they are supplied by different manufacturers. To ensure the quality of the components, the supplier sourcing team will make multi-inquiries from these manufacturers or authorized suppliers to match customer’s requirement, which usually takes 2-3 business days, and even longer for some scarce chips. Therefore, if your project is complex and the supplier quotes you within few hours, double check with them.

Step3. Sample and feedback

After confirming the PI, the supplier will usually provide pre-production samples for your approval. At the same time, the supplier will also confirm with you the logistics plan of the bulk goods. Make sure they understand your shipping requirements, including details on packaging, customs clearance, taxes, etc.

For us to have a successful LED PCB Assembly process, its functions must be defined. Compliance requirement is defined to reduce the effect when components are selected.

The Bill of Materials is then generated from the information installed on the LED PCB.

All this information is used to assemble components which are identified from MOB to the LED PCB.

After that, the routing of traces is determined to each component, based on the size, shape of the circuit board and location of connectors.

Hitech Circuits is trusted by thousands of electronic engineers on their LED PCB assembly projects, from consumer, led bulb to precisely medical LED light, we can help you from the beginning of design stage; From commercial flood LED to industrial high power LED, from automotive LED to military LED, Venture is the perfect place for your LED PCB assembly requirement.

Hitech Circuits has been participated in hundreds and thousands of LED lighting projects, by providing LED PCB and also LED PCB assembly service.

Our LED PCB assembly had covered both ends of the Lighting Class LED size spectrum, assembling some of the largest (2 meter long boards) and some of the smallest LED Lighting applications which used in Medical Endoscopes.

LED PCB Assembly is very crucial in the current industrial development. Many electrical devises are being innovated and the old once being improved.

LED PCBs are useful due to the fact that they are made using materials that can transfer and dissipate heat. This characteristic increases device durability.

The world is changing with new technology, especially PCB technology that plays an essential role in the application of LED circuits. And the LED industry is taking advantage of this technology and growing faster.

As a full feature PCB solutions provider with more than a decade of experience, we're capable to provide LED PCB fabrication, components procurement and LED PCB assembly all under one roof. We can work with you to develop metal core PCB, aluminum circuit boards customized to your specific applications. We feature competitively priced PCBs made with standard FR-4 material that includes a thermal aluminum clad layer that will efficiently dissipate heat, keep all LED PCB components cool and significantly enhance the performance of your products.

LED pcb board, LED pcb assembly

LED with its advantages of high brightness, high efficiency, low heat, long life, is considered the most development potential in the 21st century lighting. In the market and policy driven by the rapid development of the domestic LED industry blowout has formed a relatively complete industrial chain, including the production of epitaxial wafers, chip preparation, packaging, integration, LED application. In 2010, China's LED industry scale, up from $ 827 billion in 2019 to 220 billion yuan, an annual growth rate of over 70%, higher than the 50% level of growth of the global LED lighting industry output value. Among them, the middle and lower reaches of the most complete industrial chain, accounting for 90% of the overall percentage of the GDP.Chinahas become the world's leading LED manufacturing base and important application market.

To further promote the technological innovation of the LED industry, construction and wide application of independent industry chain, China Electronic Appliance Corporation and industry associations to organize the theme of "Focus on the core energy LED Exhibition will be held November 9-11, 2010  in Shanghai International Expo Center and the 78th China Electronics Fair over the same period will be held will create from raw materials, epitaxial wafers, chip, LED bracket, LED accessories, LED packaging and supporting materials, the LED backlight upstream firm to the upstream and downstream enterprises of the display, lighting, landscaping, decorative lighting, traffic lights, automotive lighting, special lighting, to the equipment, instrumentation, software, finance, consulting and other service enterprises and technological exchanges and market trading platform, help the domestic industry sustained and healthy development, and promote the steady expansion of the LED application market.

In the LED industry chain upstream of the epitaxial wafers and LED chips accounted for 70% of the profits of the whole industry, and technology-intensive, capital-intensive, where the core technology of the LED. Well-known epitaxial wafer and chip production enterprises will be exhibited a number of energy-efficient, low heat, cost-effective LED products, many of whom have excellent products of international advanced level.

LED electronic pcb assembly manufacturing 100% Original LED Chip with one-stop in-house pcba services

[hitechpcb]

What is PCB Assembly ?

PCB Assembly manufacturer - Hitech Circuits Co., Limited

 It’s the step in the manufacturing process in which you populate a blank board with the electronic components needed to make it into a functional printed circuit board. It’s these components that make a board into the circuit that enables an electronic product to function. PCB assembly typically takes place via one of two processes:

1. Surface-mount technology

SMT: SMT stands for “Surface Mount Technology“.  The SMT components are very small sizes and comes in various packages like 0201, 0402, 0603, 1608 packages for resistors and capacitors. Similarly for Integrated circuits ICs we have SOIC, TSSOP, QFP and BGA.

The SMT components assembly is very difficult for human hands and can be time taking process so it is mostly done by automated pick and place machine.

2. Through-hole manufacturing

THT: THT stands for “Through hole Technology”. The components with leads and wires, like resistors, capacitors, inductors, PDIP ICs, transformers, transistors, IGBTs, MOSFETS are example.

The component has to be inserted on one side of PCB and pulled by leg on other side and cut the leg and solder it. The THT components assembly is usually done by hand soldering and is relatively easy.

Printed Circuit Board Assembly Techniques

There are only two common PCBA techniques available for use by a PCB designer. The methods are:

1. Automated PCB Assembly Techniques

Generally, this technique employs the use of state of the art machines, which are fully automatic. For example, the surface mount components are worth positioning with the aid of an automated pick and place machine.

Again, reflow soldering is commonly for surface mount components usually done in a reflow oven. An automated solder stencil is also used to apply the solder paste on the PCB.

Finally, high tech inspection machines are used to confirm and check the quality of the PCBA. Some of which include: Automated optical inspection machine (AOI), X-ray inspection machines, etc.

Above all, due to the precise monitoring, control of soldering, no human input and versatile machines.

This technique ensures utmost efficiency, output consistencies, and limits defects.

2. Manual PCB Assembly Techniques

This method is favorite for use with through-hole parts, which needs manual placement on the board. Besides, with these through-hole parts, it’s advisable you use wave soldering. Note that in the through- hole assembly process, you need to place the components and electronics on the PCB.

After that, you use wave soldering to solder the leads. Typically, you will need an individual to insert a component into a marked PTH. Once done, transfer the PCB to the next station where the next person will be on standby tasked with fixing another part.

What are the Benefits of SMT PCB Assembly?

SMT assembly provides many benefits and some of them are as follows:

It can be used to incorporate small components.

In SMT, the components can be placed on both sides of the board.

It assures high component densities.

Fewer holes need to be drilled for surface mounting than through-hole.

It require low initial costs and time for setting up the mass production.

SMT is the simpler and faster-automated assembly when compared to through-hole.

Errors regarding the component placement can be easily rectified. 

Surface mount  PCBs feature strong joints, which can easily withstand vibrations. 

What are the techniques used in Surface Mount Technology?

There are several techniques for the reflow process. After applying the solder paste or a flux mixture on the board and after placing the components, the boards are conveyed to a reflow soldering oven. The techniques used for reflowing soldering include infrared lamps, hot gas convection, fluorocarbon liquids with a high boiling point, and so on.

What are the different testing methods used in SMT PCB Assembly?

Hitech Circuits as the PCB assembly manufacturer, we perform the following testing and inspection to ensure the quality of surface mount PCBs.

Automated Optical Inspection (AOI): This is performed before and after the soldering to identify the component placement, presence, and solder quality.

X-ray Testing: In this type of testing, the operator relies on the X-ray images of the PCB to check the solder joints and lead-less components such as Quad Flat Packs and ball grid arrays, which are generally not visible to naked eyes.

In-Circuit Testing (ICT): This method is used to detect manufacturing defects by testing the electrical properties in the SMT Assembly.

What type of files or documents should I send for SMT PCB Assembly? 

Gerber Files: The file contains all details of physical board layers including solder masks, copper layers, drill data, legends, and so on.  

Bill of Materials (BOM): This contains information on the list of items needed for the PCB manufacturing and the instructions of manufacturing. 

Pick and Place File: This file contains information on all components to be used in the PCB design and their rotation and X-Y coordinates.

The whole process of PCB Assembly

1. Bare board loader machine

The first step in the PCB assembly is to arrange the bare boards on the rack, and the machine will automatically send the boards one by one into the SMT assembly line.

2. Printing solder paste

When PCB on the SMT production line, firstly, we have to print solder paste on it, and the solder paste will be printed on the pads of the PCB. These solder pastes will be melt and solder the electronic parts to the circuit board when it passes through the high-temperature reflow oven.

In addition, when testing new products, some people will use film board/adhesive cardboard instead of solder paste, which can increase the efficiency for adjusting the SMT machines.

3. Solder paste inspection machine(SPI)

Since the quality of solder paste printing is related to the quality of welding of subsequent parts, some SMT factories will use optical machine to check the quality of solder paste after printed the solder paste in order to ensure stable quality. If there any poorly printed solder paste board, we will wash off the solder paste on it and reprint, or remove the excess solder paste if there is redundant solder paste on it.

4. High speed SMT machine

Usually, we will put some small electronic parts (such as small resistors, capacitors, and inductors) to be printed on the circuit board first, and these parts will be slightly stuck by the solder paste just printed on the circuit board, so even if the speed of printing is very fast and the parts on the board will not fall away. But large parts are not suitable for use in such high speed SMT machines, which will slow down the speed of small parts assembly. And the parts will be shifted from the original position due to the rapid movement of the board.

5. Universal SMT machine

Universal SMT machine is also known as "slow machine", it will be assembled some large electronic components, such as BGA IC, connectors, etc., these parts need more accurate positions, so the alignment is very important. Use a camera to take a picture to confirm the position of the parts, so the speed is much slower than High speed SMT machine we taked before. Due to the size of the components here, not all of them are packed in tape and reel, and some may be packed in trays or tubes. But if you want the SMT machine to recognize the trays or tube-shaped packaging materials, you must configure an additional machine.

Generally, traditional SMT machines are using the principle of suction to move electronic parts, and in order to place the parts successfully, and there must be the flat surface on these electronic components for the suction nozzle of the SMT machine to absorb. However, for some electronic parts don’t have a flat surface for these machines, and it is necessary to order special nozzles for these special-shaped parts, or add a flat tape on the parts, or wear a flat cap for thees electronic parts.

6. Manual parts or visual inspection

After assembled all parts by the high speed SMT machine or Universal SMT machine and before going through the high-temperature reflow oven, and we will set up a visual inspection station here and to pick out the deviation parts or missing components boards etc., because we have to use a soldering iron to repair if there are still defectives boards after passing the high-temperature oven, which will affect the quality of the product and will also increase the cost. in addition, for some larger electronic parts or traditional DIP parts or some special reasons cannot be processed by the SMT machine before, they will be manually placed on pcb here.

7. Reflow oven

The purpose of reflow oven is to melt the solder paste and form a non-metallic compound on the component feet and the circuit board, that means to solder electronic components on the circuit board. The temperature rise and fall curves often affect the soldering quality of the entire circuit board. According to the characteristics of the solder materials, usually the reflow oven will set the preheating zone, soaking zone, reflow zone, and cooling zone to achieve the best soldering effect.

For example, the melting point for SAC305 solder paste with lead-free is about 217°C, which means that the temperature of the reflow oven must be higher than the melting points to remelt the solder paste. What's more, the maximum temperature in the reflow furnace should not exceed 250°C, otherwise many parts will be deformed or melted because they cannot withstand such a high temperature.

Basically, after the pcb passed through the reflow oven, the assembly for the entire circuit board is almost complete. If there are hand-soldered parts, we need to transfer to DIP process, and then we have to check the quality after reflow oven by QC department.

8. Automatic optical inspection(AOI)

The main purpose of setting up AOI is because some high density boards can’t be process the following ICT test, so we used AOI inspection to replace it. But even using AOI inspections, there still have the blind spots for such checking, for example, the solder pads under the components cannot be checked by AOI. At present, it can only check whether the parts have side standing issue, missing parts, displacement, polarity direction, solder bridges, lack of soldering etc., but cannot checking the BGA solderability, resistance value, capacitance value, inductance value and other components quality, so far AOI inspection can’t completely replace ICT test.

Therefore, there is still some risk if only AOI inspection is used to replace ICT testing, but ICT test is also not 100% make sure the good quality, we suggest these two ways can be combined with together to make sure the good quality.

9. PCB unloader machine

After the board is fully assembled, it will be retracted to the unloder machine, which has been designed to allow the SMT machine to automatically pick and place the board without damaging the quality for PCB.

10. Visual inspection for finished products

Normally there will be a visual inspection area in our SMT production line whether there is an AOI station or not, and it will help to check if there are any defectives after completed assembled the pcbs. If there is an AOI station, it can reduce the visual inspection worker on our SMT line, and to reduce the potential cost, and because it is still necessary to check some places that cannot be judged by AOI, many SMT factories will provide the mainly visual inspection templates at this station, which is convenient for visual inspection worker to inspect some key parts and polarity for components.

11. DIP process

DIP process is a very important process in the whole PCBA processing, and the processing quality will directly affect the functional for PCBA boards, so it is necessary to pay more attention to the DIP process. There are many preliminary preparations for DIP process. The basic process is to re-process the electronic components first, like to cut the extra pins for some DIP components, our staff received the components according to the BOM list, and will check whether the material part numbers and specifications are correct or not, and performs pre-production pre-processing according to the PCBA samples. The steps are: Use various related equipment (automatic capacitor pins cutting machine, jumper bending machine, diode and triode automatic forming machine, automatic belt forming machine and other machines) for processing.

12. ICT test

Printed Circuit board open/short circuit test (ICT, In-Circuit Test), The purpose of ICT test is mainly to test whether the components and circuits on the printed circuit board are open or short issues. It can also measure the basic characteristics of most components, such as resistance, capacitance, and inductance values to judge whether the functions of these parts are damaged, wrong parts or missing parts etc. after passing through the high-temperature reflow oven.

ICT test machines are divided into advanced and basic machines. The basic ICT test machines are generally called MDA (Manufacturing Defect Analyzer). It’s just to measure the basic characteristics of electronic components and judge open and short circuits issue we talked above.

In addition to all the functions of the basic ICT test machines, for advanced ICT test machine can also test the whole PCBA by using power, start to testing the PCBA boards by setting the program in the test machine. The advantage is that it can simulate the function of the printed circuit board under the actual power-on condition, this test can partly replace the following functional test machine (Function Test). But the cost for the test fixture of this advanced ICT test can probably buy a car, it’s too expensive and we suggest it can be used in mass production products.

13. PCBA function test

Functional testing is to make up for the ICT test, because ICT only tests the open and short circuits on the the PCBA board, and other functions such as BGA and other fuctions are not tested, so it is necessary to use a functional testing machine to test all functions on the whole PCBA board.

14. Cutting board (assembly board de-panel)

Normally, printed circuit boards will be produced in panel, and it will be assembled to increase the efficiency of SMT production. It means several single boards in one panel, such as two-in-one, four-in-one etc. After finished all the pcb assembly process, it needs to be cut into single boards, and for some printed circuit boards with only single boards also need to cut off some redundant board edges.

There are several ways to cut the printed circuit board. You can design the V-cut using the blade cutting machine (Scoring) or directly manually break off the board (not recommended). For more high density circuit boards, it will be used the professional splitting machine or the router to split the board without any damage the electronic components and printed circuit boards, but the cost and working hours will be a little longer.

Why Choose Hitech Circuits PCB Assembly Manufacturer for Your PCB Assembly Projects?

There are several PCB manufacturers specializing in PCB assemblyservices. However, Hitech Circuits PCB Assembly stands out owing to the following:

Assistance in Material Procurement: 

Technically, in PCB assembly services, the quality of parts is the responsibility of the OEM; however, we ease your job by assisting you to make the right selection. We can help you procure all your parts of the same type own a single part number, thanks to our supply chain and vendor network as well as experience. This saves time and cost that goes in ordering single parts as you plan.

Testing procedures: 

We are very focused on quality and thus implement stringent testing procedures at each stage of the assembly and after completion.

Fast Turnaround Times: 

Our well-equipped facility and the right tools enable us to complete your requirements well before time, and without compromising on the quality or functioning of the PCBs. For simple designs we revert in 24 to 48 hours.

Cost Effectiveness: 

While PCB assembly is a cost-effective alternative, we go a step further and assure that the parts you list are of a good quality and suitable for your requirement. Also, you can control the part flow and replenish them as needed. This eliminates the need to buy extra stock and store it.

Quick Quote: 

We offer a quick quote based on your BOM. All you need is a detailed BOM, Gerber files, your application requirement sheet, and quantity.

We’re not one to stand still, which is why we use the latest equipment and the finest minds to create your PCB projects. We’re constantly keeping our finger on the pulse of the latest trends. And as a result, we know how to deliver the highest standards of PCB assembly to meet all your requirements.

Our dedicated, friendly customer service team also means that we support you every step of the way. Offering our expert guidance to ensure a complete PCB project that you’re happy with.

Contact us today

No matter what your printed circuit board assemblyneeds are, we always aim to deliver efficient, dependable solutions. For more information about our services, do not hesitate to get in touch with us today for a no-obligation quote